Drag 'n' Drop ftp app in a web page.?

I hope this is the right forum for this question..

I need to create an ftp facility within a web page for a web site we are building for a client (they are printers and need clients to upload large image files for them to then download - they will be too large to email) and rather than just offer a simple link to open the ftp window in IE, which has no control over file size, and will show whoever logs in whats sitting there etc.. I wanted to purchase a DW extension or (if possible) create the facility in DW using WA software (if I can).

I hope I've made this clear.

Can it be done using WA software.?
Is there a DW extension I haven't seen?

Any ideas or help would be greatly appreciated. Please note I am not a programmer or database builder so please keep any solutions or advice to a sensible 'I know DW well and web site design' level :-)

Cheers all.